Hi everyone, I'm confused in the difference of libraries between arbotix-0015 and robocontroller-0010, noting that there exist many same-name directories such as Motors 2, Motors, and so on. I also noted that robocontroller-0010 was released in 2010 while arbotix-0015 was in 2012, so it seems that I should use priorly libraries in arbotix-0015, but in ROS tutorial "http://wiki.ros.org/arbotix_firmware?distro=hydro" it seems that I should install arbotix firstly and then the robocontroller, which would cover the former. Can anyone tell me why? Thanks in advance!